System of electrical distribution.



No. 650,55I.

Patented May 29, |900.

M. l. BAIRD.

SYSTEM 0F ELECTRICAL DISTRIBUTION.

(Application iled Dec. 1, 1899.)

KM/Wm g MM/l@ 'VW-UNL@ Tn: Nonms FErERsco. pHoro-nwo, wAsHlNGToN, n c.

OLA/vel UNITED STATES PATENT Ormea.

MILTON I. nAIRD, or GLENFIELD, PENNsYLvANiA.

SYSTEM ,OF ELECTRICAL DISTRIBUTION.

SPECIFICATION forming part of Letters Patent No. 650,551, dated May 29,1900. Application tiled December l, 1899. Serial No. 738,837. (Nomodel.)

To all whom it may concern:

Beit known that I, MILTON I. BAIRD, a citizen of the United States,residing at Glenlield, in the county of Allegheny and State ofPennsylvania, have invented or discovered certain new and usefulImprovements in Systems of Electrical Distribution, of whichimprovements the following is a specification.

The invention described herein relates to certain improvements in thearrangement or distribution of main and branch wires or ca bles fortelephone, telegraph, and other purposes. The practice now in generaluse consists in supporting the main cable by a carrier-wire, the cableand wire bein g connected by clips or a wrapping of wire or marline.lVhen it is desired to connect branch wires or cables to the main cable,the latter is opened at a post and the branch wires or the conductors ofthe branch cable electrically connected to the conductors of the maincable. As the branch wires or cables lead directly from the postssupporting the main cable, great diliculty is sometimes experienced inavoiding trees and electric-light wires and other obstructions.

The object of the present invention is to provide for leading off thebranch Wires or cables when necessary at points other than those wherethe main cable is tapped.

The invention is hereinafter more fully described and claimed.

In the accompanying drawings, forming a part of this specification,Figure l shows a portion of a main line of cable having branchesarranged in accordance with my improvement; and Fig. 2 is a transversesection on the line :c 0c, Fig. l.

In the practice of my invention the main cable 1, which is preferably ofthe form or construction set forth in application Serial No. 728,405,tiled by me August 25, 1899, is suspended from the carrier-wire 2 byclips 3 or in any othersuitable manner knownin the art. The branch wiresor conductors of the branch cable 4 1I ab, dac., are electricallyconnected to the proper conductors of the main cable at the points 5where the conductors of the main cable are exposed for branchingpurposes, as described and claimed in the application referred to. Itfrequently occurs that the points 5 are not in the line in which Athebranch wires or cable is to extend, or

there is some object, as a tree or other obstruction, preventing thebranch cable from being led directly away from the main cable. In suchcase the branch wire or cable is led parallel with the main cable to apoint from which it can be led directly away from the main cable. Atthis point an insulator 6 is secured to the main cable or carrier-Wire,as shown, and the branch cable or Wire attached thereto. The portion ofthe branch cable between the point 5, where it is electrically connectedto the main cable, and the insulator G or leading-away point issupported by the main cable -or carrier-wire through the medium of theclips 3, as shown in Fig. 2, or in any othersuitable manner. When thepoles are so spaced that the exposed portions 5 of the cable are locatedat or closely adjacent to the poles, the connection of the branchconductors with the conductors of the main cable can be easily made fromthe pole; but when the exposed portions 5 of the main-cable conductorsare at a distance from the poles a trolley 7 must be used. Thecarrierwire 2 may at times be used as a support for the trolley, butcannot be so used when a branch, as 4, has been made in the mannerhereinbefore described, and another branch, as Lia, from the same point5 is to be led oit between the same poles, as the first branch wouldprevent the trolley moving along the carrier to the point Where theinsulator 6 for the branch B is to be attached. To render all points ofthe cable accessible at all times, a second or trolley wire 8 is securedto the poles immediately below the main cable.

I claim herein as my invention- 1. In a system for the distribution ofelectric currents the combination of a main cable, branch conductorselectrically connected to the conductorsof the main cable, and supportedparallel with the main cable from its point of electrical connection tothe main cable to the point of lead out and means for holding the branchconductors xed at the points of lead out, substantially as set forth.

2. In a system for the distribution of electric currents, thecombination of a'mainca-V ble consisting of a series of protectedsections, the conductors between such sections being IOO exposed, branchconductors connected to the In testimony whereof I have hereunto setconductors of the main cable at the exposed my hand.

points, and supported parallel With the main 1 cable from such points ofconnection to the MIL ON I bAIRD points 01": lead out and means forholding \Vitnesses:

the branch conductors xed at the points of DARWIN S. VVOLCOTT,

lead out, substantially as set forth. F. E. GAITHER,

